Really
Simple Syndication (RSS) is a family of web formats used
to publish frequently updated digital content.
Most commonly used to update news articles and other content that
changes quickly, RSS feeds may also include audio files (PodCasts)
or even video files (VodCasts). Users of RSS content use programs
called feed 'readers' or 'aggregators' (newer versions of Web browsers
offer built in support for RSS feeds): the user 'subscribes' to
a feed by entering the link of the RSS feed into their RSS feed
reader; the RSS feed reader then checks the subscribed feeds
to see if any have new content since the last time
it checked, and if so, retrieves the new content and present it
to the user.